The part of Hal Jordan comes down to two factors, the look and the ability of the actor, and Josh Duhamel has both; he has been in action and rom-com movies and has done well in both genres. Duhamel has the experience of being in a large blockbuster franchise from participating in the Transformers movies. Sure, in those movies, he played a mostly one-dimensional soldier, but still gained recognition from being in a financially successful film franchise. As a known commodity, he could bring male and female fans to the theaters to watch his Intergalactic Policeman fight evil on the big screen.